Hi!
The problem occurred in my customer's set with BQ25890.
In case 1 below, it is normal, but in case 2, Vsys does not come on.
1. When charging, VSYS powers on.
2. If not charging, BAT power is present but VSYS power is not.
When connecting the charger and removing the charger while running Set, the VSYS power is turned off immediately.
If you check the symptoms, it works as if it is disabled even though the battery is connected.
The following is the BQ25890 register when the problem occurs with reference.
|
Reg[0x00] = 0x5c Reg[0x01] = 0x06 Reg[0x02] = 0x5d Reg[0x03] = 0x1a Reg[0x04] = 0x9c Reg[0x05] = 0x13 Reg[0x06] = 0x7e Reg[0x07] = 0x8f Reg[0x08] = 0x03 Reg[0x09] = 0x4c Reg[0x0a] = 0x77 Reg[0x0b] = 0x86 Reg[0x0c] = 0x00 Reg[0x0d] = 0x55 Reg[0x0e] = 0x4a Reg[0x0f] = 0x4d Reg[0x10] = 0x58 Reg[0x11] = 0xe1 Reg[0x12] = 0x00 Reg[0x13] = 0x0b Reg[0x14] = 0x1d |
REG09 [5] Try BATFET_DIS = 1-> 0 and force BATFET off-> on
REG14 [7] I tried Register Reset with REG_RST = 1, but the problem is still not solved.
The problem occurred in my customer's set with BQ25890.
In case 1, case 1 is normal, but in case 2, Vsys does not come on.
1. When charging, VSYS powers on.
2. If not charging, BAT power is present but VSYS power is not.
When connecting the charger and removing the charger while running Set, the VSYS power is turned off immediately.
If you check the symptoms, it works as if it is disabled even though the battery is connected.
The following is the BQ25890 register when the problem occurs with reference.
REG09 [5] Try BATFET_DIS = 1-> 0 and force BATFET off-> on
REG14 [7] I tried Register Reset with REG_RST = 1, but the problem is still not solved.
As for the above problem, please check whether the situation where VSYS goes off occurs or if there is such a case.
Please advise if there is a solution.
Please check it.
Thank you.
Best regards.
From Anthony.
